Stenciling material.



NITED sTa'rEs rarnnr oa niono f ALBERT B. DICK, 0F LAKE'FOREST, ILLINUIS, ASSIGNOR TO A. 13,;DICK CQMPANY, 0F

CHICAGO, ILLINOIS, A COMORATION OF ILLINOIS.

STENCILING MATERIAL.

noaasar, No Drawing.

Specificationfof Letters Patent.

To all whom it may concern:

Be it known that l, ALBERT B. DICK, a citizen of the United States, residing at Lake Forest, in the county of Lake and State of- Illinois, have invented certain new and useful Improvements in Stencilin Material, of which the following isa speci cation.

The invention relates more particularly to the use of stencil-sheets which require for their efiicient operation moistening as a preliminary to the striking of-the type there- I on. Stencil-sheets of this character are now beingmade with a base of open porous paper such as Japanese yoshino paper, this being impregnated with a compound consisting largely of coagulated protein. This compound is normally dry but hygroscopic,

and while a stencil may be formed by causing the type of a writing-machine to impinge thereon in such state, yet superior results are obtained if prior to the stencil-cuttin operation the sheet is suitably moistene An ideal moistening fluid must have certain characteristics, included among which is they characteristic of being slow-drying; other: wise, a sheet moistened preliminarily to be ing placed in a writing-machine would, if the operation were delayed, become dried out before the entire surface thereof had been typed. Agaimthe fluid should be of such character as to cooperate with the material to which it is preferably applied, in providing a soft backing next adjacent to the stencil-sheet, to avoid fracture of the fibers of the paper, due to the impact of the t pe.

l have discovered that a highly eficient moistening material may be formed by combining water, glycerin and lurlzeyred oil. l/Vhile the proportions of these be Varied Within wide limits, I prefer to em- .ploy a composition consisting of approximately 72% of water, 25% of glycerin, and 3% of Turkey-red oil. These ingredients combine readily in a, single solution and may Patented Apr, 28, 1914i, Application filed May 3, 1913. Serial No. 765,236.

easily be applied to the stencil in any desirable manner, as, for instance, by brushing su'ch solution upon the stencil-sheet itself 7 or by impregnating therewith a sheet of absorbent paper or cloth and placing the same immediately below the stencil-sheet, so that the moisture carried thereby may be readily transmitted to such sheet. As a result of either mode of application, the stencil-sheet is uniformly moistened over the entire operative surface thereof, or so much of such surface as it is desired to utilize in the stencil-cutting operation, and upon the completion of such operation the sheet maybe readily dried for insertion in a suitable duplicating machine, adapted for the production of multiple copies.

What ll claim and desire to secure by Letters Patent is as follows 1. In stenciling material, a stencil-mois tening composition including glycerin and Turkey-red oil and a fluid with which said tening composition including water, glyc erin and Turkey-red oil, substantially as set forth. This specification signed this 28th day of April, 1913.

v v annnnr n; DICK, l fitnesses it. l-lanemeron, ll-l. Bnniran'r,

and witnessed 

